EP0399355B1 - Broadcast receiver - Google Patents

Broadcast receiver Download PDF

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Publication number
EP0399355B1
EP0399355B1 EP90109220A EP90109220A EP0399355B1 EP 0399355 B1 EP0399355 B1 EP 0399355B1 EP 90109220 A EP90109220 A EP 90109220A EP 90109220 A EP90109220 A EP 90109220A EP 0399355 B1 EP0399355 B1 EP 0399355B1
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EP
European Patent Office
Prior art keywords
memory
assigned
alternative frequencies
frequency
frequencies
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP90109220A
Other languages
German (de)
French (fr)
Other versions
EP0399355A3 (en
EP0399355A2 (en
Inventor
Wilhelm Hegeler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Blaupunkt Werke GmbH
Original Assignee
Blaupunkt Werke GmbH
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Filing date
Publication date
Application filed by Blaupunkt Werke GmbH filed Critical Blaupunkt Werke GmbH
Publication of EP0399355A2 publication Critical patent/EP0399355A2/en
Publication of EP0399355A3 publication Critical patent/EP0399355A3/en
Application granted granted Critical
Publication of EP0399355B1 publication Critical patent/EP0399355B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/20—Arrangements for broadcast or distribution of identical information via plural systems
    • H04H20/22—Arrangements for broadcast of identical information via plural broadcast systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H2201/00—Aspects of broadcast communication
    • H04H2201/10—Aspects of broadcast communication characterised by the type of broadcast system
    • H04H2201/13—Aspects of broadcast communication characterised by the type of broadcast system radio data system/radio broadcast data system [RDS/RBDS]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/27—Arrangements for recording or accumulating broadcast information or broadcast-related information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H60/00—Arrangements for broadcast applications with a direct linking to broadcast information or broadcast space-time; Broadcast-related systems
    • H04H60/35—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users
    • H04H60/37—Arrangements for identifying or recognising characteristics with a direct linkage to broadcast information or to broadcast space-time, e.g. for identifying broadcast stations or for identifying users for identifying segments of broadcast information, e.g. scenes or extracting programme ID

Definitions

  • the object of the property right is a radio receiver with a radio data signal decoder, or RDS decoder for short.
  • the continuous data stream output by these RDS decoders also contains data about the program chain, PI code, to which the set transmitter belongs and about the alternative frequencies AF, on which the same program is transmitted.
  • the object of the invention was, inter alia, to reduce this memory requirement.
  • a radio receiver according to the invention can also be used advantageously for solving other tasks.
  • the radio receiver receives the station set in the tuner 2 via an antenna 1.
  • the setting can be made in the same way by manual tuning 3, by an automatic station search 4 or by station buttons 5, which are combined in a control unit 6 and connected to the tuner.
  • the data that determine the setting of the tuner can be tapped off at the output 7 of the control unit 6.
  • the modulation of the transmitter set in tuner 2 is converted in IF stage 8 to the intermediate frequency of the receiver and is available at the output of demodulator 9.
  • the baseband of the received signal is separated in filter stage 10 from the 57 kHz subcarrier.
  • the sound signal is amplified in the LF stage 11 and made audible via the loudspeaker 12.
  • the ARI / RDS demodulator 13 connected to the filter stage 10, the ARI identifiers that may be present and the RDS data stream are separated from the subcarrier.
  • the continuous RDS data stream is divided by the RDS decoder 14 into the information blocks contained in it.
  • the information about the so-called lists of alternative frequencies is usually stored in a suitable large memory 15.
  • the transmitter also transmits the PI code of the program chain to which the transmitter is assigned elsewhere in the data stream is. This code can be tapped at the output 16 of the decoder 14.
  • the memory requirement for the large memory is, among other things, a critical variable.
  • an evaluation memory 18 is provided, which is filled with a small number.
  • a memory 19 for a PI code is assigned to a memory line for alternative frequencies.
  • the number stored in the evaluation memory is increased in the following way. As soon as the setting of a new transmitter whose PI code is available at the output 16, the AFs assigned to it by a first appropriately programmed control circuit 20, z. B. the AFs stored in line 2 are read into a working memory 21, together with the respective frequency numbers which are assigned to the alternative frequencies. The set transmitter and the transmitter frequencies which can be used alternatively to it and their previous number of frequencies are then stored in the working memory 21.
  • the number in the evaluation memory 18, which corresponds to the set frequency, which can be tapped at the output 7 of the control unit, is then increased by one unit by the first control circuit.
  • the AFs that can be tapped at the output 22 of the RDS demodulator 14 are then read into the working memory 21 from the list assigned to the set transmitter and alternative frequencies transmitted by it.
  • the frequency number is increased by one unit during this reading-in process, the remaining AFs are additionally stored in the working memory 21 registered with the frequency number 1.
  • the frequency information now contained in the working memory 21 is available via the control panel for alternative tuning of the receiver. If a change of transmitter is necessary, the receiver is first automatically tuned to the alternative frequency, the evaluation memory of which contains the highest number of frequencies. If this transmitter is worth receiving, the frequency number in the evaluation memory 18 is increased by one unit in addition to the newly set frequency specification.
  • the frequency information in the working memory 21 can not be deleted in the program of the second control circuit as long as the number of alternative frequencies in the working memory 21 is smaller than the number of places in the corresponding memory line in the large memory 15.
  • the number of storage locations for alternative frequencies in the large memory 15 is smaller than the number of alternative frequencies which after the deletion, i. H. after the number of frequencies has decreased by one unit in the work memory 21, then the repetition of the reduction in the number of frequencies in the manner described can be provided for by another unit and thus the deletion of further AFs in the program of the second control circuit 23.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Circuits Of Receivers In General (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)

Abstract

A broadcast receiver with a radio data signal (RDS) decoder is described which comprises, among other things, a memory for the PI code and for alternative frequencies. Each frequency memory contains a memory location in which the frequency of the adjustments is registered. In addition, a control circuit is provided which decrements all frequency numbers by one unit and deletes the frequencies the frequency number of which is equal to zero after that.

Description

Der Gegenstand des Schutzrechts ist ein Rundfunkempfänger mit einem Radiodatensignaldecoder, kurz RDS-Decoder genannt.The object of the property right is a radio receiver with a radio data signal decoder, or RDS decoder for short.

Bekanntlich befinden sich in dem von diesen RDS-Decodern ausgegebenen kontinuierlichen Datenstrom auch Daten über die Programmkette, PI-Code, zu der der eingestellte Sender gehört und über die alternativen Frequenzen AF , auf denen dasselbe Programm übertragen wird.As is known, the continuous data stream output by these RDS decoders also contains data about the program chain, PI code, to which the set transmitter belongs and about the alternative frequencies AF, on which the same program is transmitted.

Es ist bekannt, einen PI-Code und die ihm zugeordneten AFs im Rundfunkempfänger zu speichern (z.B. EP-A-275527). Es ist auch schon vorgeschlagen worden, alle früher vom Rundfunkempfänger empfangenen PI-Codes und diesem zugeordnet die dabei eingestellten Frequenzen als alternative Frequenzen zu speichern.It is known to store a PI code and the AFs assigned to it in the radio receiver (e.g. EP-A-275527). It has also already been proposed to store all the PI codes previously received by the radio receiver and associated with them and the frequencies set in the process as alternative frequencies.

Bei einem tragbaren Rundfunkempfänger, der in der Regel seinen Standort von Zeit zu Zeit wechselt, aber an dem neuen Standort wieder für eine Zeitdauer stationär betrieben wird, aber auch bei einem Autoradio, sind nicht alle alternativen Frequenzen, die der Datenstrom beinhaltet, von gleicher Bedeutung. Würde man, wie bereits vorgeschlagen, jedem empfangbaren PI-Code einen Speicher zuordnen, der Platz für alle vom System her möglichen alternativen Frequenzen bietet, so entstände ein erheblicher Speicherbedarf.In the case of a portable radio receiver, which usually changes its location from time to time, but is operated stationary again at the new location for a period of time, but also with a car radio, not all alternative frequencies that the data stream contains are of equal importance . If, as already suggested, assigning a memory to each receivable PI code that offers space for all alternative frequencies possible by the system would result in a considerable memory requirement.

So lag der Erfindung unter anderem die Aufgabe zugrunde, diesen Speicherbedarf zu reduzieren.The object of the invention was, inter alia, to reduce this memory requirement.

Die Lösung dieser Aufgabe erfolgt durch die im Hauptanspruch angegebene Merkmalskombination.This problem is solved by the combination of features specified in the main claim.

Ein erfindungsgemäßer Rundfunkempfänger läßt sich daneben auch zur Lösung anderer Aufgaben vorteilhaft verwenden.A radio receiver according to the invention can also be used advantageously for solving other tasks.

Anhand der Zeichnung wird die Erfindung im folgenden näher erläutert.

  • Die Figur 1 zeigt das Ausführungsbeispiel eines erfindungsgemäßen Rundfunkempfängers im Blockschaltbild.
The invention is explained in more detail below with the aid of the drawing.
  • Figure 1 shows the embodiment of a radio receiver according to the invention in a block diagram.

Über eine Antenne 1 empfängt der Rundfunkempfänger den in dem Tuner 2 eingestellten Sender. Die Einstellung kann in gleicher Weise durch eine Handabstimmung 3, durch einen automatischen Sendersuchlauf 4 oder durch Stationstasten 5 erfolgen, die in einem Bedienteil 6 zusammengefaßt und an den Tuner angeschlossen sind. Die Daten, die die Einstellung des Tuners bestimmen, sind am Ausgang 7 des Bedienteils 6 für sich abgreifbar.The radio receiver receives the station set in the tuner 2 via an antenna 1. The setting can be made in the same way by manual tuning 3, by an automatic station search 4 or by station buttons 5, which are combined in a control unit 6 and connected to the tuner. The data that determine the setting of the tuner can be tapped off at the output 7 of the control unit 6.

Die Modulation des im Tuner 2 eingestellten Senders wird in der ZF-Stufe 8 auf die Zwischenfrequenz des Empfängers umgesetzt und steht am Ausgang des Demodulators 9 zur Verfügung. Das Basisband des empfangenen Signals wird in der Filterstufe 10 vom 57-kHz-Hilfsträger getrennt. Das Tonsignal wird in der NF-Stufe 11 verstärkt und über den Lautsprecher 12 hörbar gemacht.The modulation of the transmitter set in tuner 2 is converted in IF stage 8 to the intermediate frequency of the receiver and is available at the output of demodulator 9. The baseband of the received signal is separated in filter stage 10 from the 57 kHz subcarrier. The sound signal is amplified in the LF stage 11 and made audible via the loudspeaker 12.

In dem an die Filterstufe 10 angeschlossenen ARI/RDS-Demodulator 13 werden die gegebenenfalls vorhandenen ARI-Kennungen und der RDS-Datenstrom vom Hilfsträger getrennt. Der stetige RDS-Datenstrom wird vom RDS-Decoder 14 in die in ihm enthaltenen Informationsblöcke unterteilt.In the ARI / RDS demodulator 13 connected to the filter stage 10, the ARI identifiers that may be present and the RDS data stream are separated from the subcarrier. The continuous RDS data stream is divided by the RDS decoder 14 into the information blocks contained in it.

Die Informationen über die sogenannten Listen alternativer Frequenzen werden üblicherweise in einem geeigneten Großspeicher 15 abgelegt. Neben diesen Listen überträgt der Sender an anderer Stelle im Datenstrom auch den PI-Code der Programmkette, der der Sender zugeordnet ist. Dieser Code ist an dem Ausgang 16 des Decoders 14 abgreifbar.The information about the so-called lists of alternative frequencies is usually stored in a suitable large memory 15. In addition to these lists, the transmitter also transmits the PI code of the program chain to which the transmitter is assigned elsewhere in the data stream is. This code can be tapped at the output 16 of the decoder 14.

In den Rundfunkempfängern, die auch alternative Frequenzen anderer Programmketten in einem Großspeicher 15 bereithalten, ist unter anderem der Speicherbedarf für den Großspeicher eine kritische Größe.In the radio receivers, which also hold alternative frequencies of other program chains in a large memory 15, the memory requirement for the large memory is, among other things, a critical variable.

Daher sind in dem Großspeicher 15 des Ausführungsbeispiels der Erfindung neben jedem Speicherplatz 17 für die alternativen Frequenzen ein Bewertungsspeicher 18 vorgesehen, der mit einer kleinen Zahl gefüllt wird. Jeweils einer Speicherzeile für alternative Frequenzen ist ein Speicher 19 für einen PI-Code zugeordnet.Therefore, in the large memory 15 of the exemplary embodiment of the invention, in addition to each memory location 17 for the alternative frequencies, an evaluation memory 18 is provided, which is filled with a small number. A memory 19 for a PI code is assigned to a memory line for alternative frequencies.

Die Erhöhung der in dem Bewertungsspeicher eingeschriebenen Zahl geschieht auf folgendem Wege. Sobald nach Einstellung eines neuen Senders dessen PI-Code am Ausgang 16 verfügbar ist werden von einer ersten entsprechend programmierten Steuerschaltung 20 aus dem Speicher 15 die diesen zugeordneten AFs, z. B. die in der Zeile 2 gespeicherten AFs in einen Arbeitsspeicher 21 eingelesen, und zwar zusammen mit den jeweiligen Häufigkeitszahlen, die den alternativen Fequenzen zugeordnet sind. In dem Arbeitsspeicher 21 stehen dann der eingestellte Sender und die zu ihm alternativ verwendbaren Senderfrequenzen und deren bisherige Häufigkeitszahl.The number stored in the evaluation memory is increased in the following way. As soon as the setting of a new transmitter whose PI code is available at the output 16, the AFs assigned to it by a first appropriately programmed control circuit 20, z. B. the AFs stored in line 2 are read into a working memory 21, together with the respective frequency numbers which are assigned to the alternative frequencies. The set transmitter and the transmitter frequencies which can be used alternatively to it and their previous number of frequencies are then stored in the working memory 21.

Die Zahl in dem Bewertungsspeicher 18, welcher der eingestellten Frequenz entspricht, die am Ausgang 7 des Bedienteils abgreifbar ist, wird sodann von der ersten Steuerschaltung um eine Einheit erhöht. Danach werden die am Ausgang 22 des RDS-Demodulators 14 abgreifbaren AFs aus der dem eingestellten Sender zugeordneten Liste und von ihm übertragenen alternative Frequenzen in den Arbeitsspeicher 21 eingelesen. Bei den Frequenzangaben, die mit solchen übereinstimmen, die bereits aus dem Großspeicher 15 ausgelesen wurden und sich im Arbeitsspeicher befinden, wird bei diesem Einlesevorgang die Häufigkeitszahl um eine Einheit erhöht, die übrigen AFs werden zusätzlich in den Arbeitsspeicher 21 mit der Häufigkeitszahl 1 eingeschrieben. Die jetzt im Arbeitspeicher 21 enthaltenen Frequenzangaben stehen über das Bedienteil zur alternativen Abstimmung es Empfängers zur Verfügung. Dabei wird der Empfänger, falls ein Senderwechsel erforderlich wird, zuerst auf die alternative Frequenz automatisch abgestimmt, deren Bewertungsspeicher die höchste Häufigkeitszahl enthält. Ist dieser Sender empfangswürdig, so wird die Häufigkeitszahl in dem Bewertungsspeicher 18 neben der neu eingestellten Frequenzangabe um eine Einheit erhöht.The number in the evaluation memory 18, which corresponds to the set frequency, which can be tapped at the output 7 of the control unit, is then increased by one unit by the first control circuit. The AFs that can be tapped at the output 22 of the RDS demodulator 14 are then read into the working memory 21 from the list assigned to the set transmitter and alternative frequencies transmitted by it. In the case of the frequency indications which correspond to those which have already been read out of the main memory 15 and are in the working memory, the frequency number is increased by one unit during this reading-in process, the remaining AFs are additionally stored in the working memory 21 registered with the frequency number 1. The frequency information now contained in the working memory 21 is available via the control panel for alternative tuning of the receiver. If a change of transmitter is necessary, the receiver is first automatically tuned to the alternative frequency, the evaluation memory of which contains the highest number of frequencies. If this transmitter is worth receiving, the frequency number in the evaluation memory 18 is increased by one unit in addition to the newly set frequency specification.

Bei Einleitung eines Programmwechsels, z. B. durch Betätigung einer anderen Stationstaste oder durch manuelle Auslösung eines neuen Sendersuchlaufs, werden über eine zweite entsprechend programmierte Steuerschaltung 23 die Zahlen in allen Bewertungsspeichern 18 im Arbeitsspeicher 21 um eine Einheit erniedrigt und dabei alle diejenigen Frequenzangaben gelöscht, deren Bewertungsspeicher danach die Häufigkeitszahl Null enthält. Die verbleibenden alternativen Frequenzen werden mit ihrer Häufigkeitszahl in den Großspeicher 15 in die Zeile 2 zurückübertragen.When initiating a program change, e.g. B. by pressing another station button or by manually triggering a new station search, the numbers in all evaluation memories 18 in the working memory 21 are reduced by one unit via a second appropriately programmed control circuit 23 and all those frequency data are deleted, the evaluation memory of which then contains the frequency number zero . The remaining alternative frequencies with their frequency number are transferred back to row 2 in the large memory 15.

Die Löschung der Frequenzangaben in dem Arbeitsspeicher 21 kann in dem Programm der zweiten Steuerschaltung unterbleiben, solange die Zahl der alternativen Frequenzen in dem Arbeitsspeicher 21 kleiner als die Zahl der Plätze in der entsprechenden Speicherzeile im Groß-speicher 15 ist.The frequency information in the working memory 21 can not be deleted in the program of the second control circuit as long as the number of alternative frequencies in the working memory 21 is smaller than the number of places in the corresponding memory line in the large memory 15.

Ist dagegen die Zahl der Speicherplätze für alternative Frequenzen im Großspeicher 15 kleiner als die Zahl der alternativen Frequenzen, die nach der Löschung, d. h. nach der Verminderung der Häufigkeitszahl um eine Einheit im Arbeitsspeicher 21 verblieben sind, dann kann die Wiederholung der Verminderung der Häufigkeitszahl in der beschriebenen Weise um eine weitere Einheit und damit die Löschung weiterer AFs im Programm der zweiten Steuerschaltung 23 vorgesehen werden.If, on the other hand, the number of storage locations for alternative frequencies in the large memory 15 is smaller than the number of alternative frequencies which after the deletion, i. H. after the number of frequencies has decreased by one unit in the work memory 21, then the repetition of the reduction in the number of frequencies in the manner described can be provided for by another unit and thus the deletion of further AFs in the program of the second control circuit 23.

Claims (2)

  1. Radio receiver having a radio data signal decoder and memories (19) for the PI codes assigned to the stations received and further memories (17) for the alternative frequencies assigned to each PI code, characterized in that each memory location (17) for a frequency is assigned a rating memory (18), in that a first control circuit (20) is provided, which writes to the assigned rating memories (18) the rate-of-occurrence of the setting of each frequency and in that a second control circuit (23) is provided, which reduces all the written rate-of-occurrence numbers by one unit and erases the frequencies of which the rate-of-occurrence number thereafter is equal to zero.
  2. Radio receiver according to Claim 1, characterized in that, apart from a mass memory (15) for PI codes and for each assigned list of alternative frequencies, a main memory (21) is provided, which receives from the mass memory (15) the list of alternative frequencies assigned to the PI code of the set station as well as the list of alternative frequencies transmitted by the set station, and in that the rate-of-occurrence number in the rating memory (18) is increased by one unit in the case of those alternative frequencies which both can be taken from the mass memory (15) and are contained in the received list (22), and in that, if it is required to tune the receiver to alternative frequencies, these are selectable, if appropriate one after the other, corresponding to their rate-of-occurrence number from the main memory (21).
EP90109220A 1989-05-26 1990-05-16 Broadcast receiver Expired - Lifetime EP0399355B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3917236A DE3917236C1 (en) 1989-05-26 1989-05-26
DE3917236 1989-05-26

Publications (3)

Publication Number Publication Date
EP0399355A2 EP0399355A2 (en) 1990-11-28
EP0399355A3 EP0399355A3 (en) 1991-10-16
EP0399355B1 true EP0399355B1 (en) 1994-07-13

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ID=6381485

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Application Number Title Priority Date Filing Date
EP90109220A Expired - Lifetime EP0399355B1 (en) 1989-05-26 1990-05-16 Broadcast receiver

Country Status (5)

Country Link
EP (1) EP0399355B1 (en)
JP (1) JP2968313B2 (en)
KR (1) KR0133060B1 (en)
AT (1) ATE108590T1 (en)
DE (2) DE3917236C1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4024366C2 (en) * 1990-08-01 1993-12-09 Blaupunkt Werke Gmbh Car radio with a radio data signal decoder
JP2658538B2 (en) * 1990-09-14 1997-09-30 三菱電機株式会社 RDS receiver
DE4038597A1 (en) * 1990-12-04 1992-06-11 Grundig Emv RDS BROADCAST RECEIVER WITH EXTENDED STORAGE CAPACITY FOR DETECTING ALTERNATIVE FREQUENCIES
DE4103062C2 (en) * 1991-02-01 1994-03-31 Blaupunkt Werke Gmbh Radio receiver
JP3272880B2 (en) * 1994-09-02 2002-04-08 パイオニア株式会社 RDS receiver

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2666861B2 (en) * 1986-12-19 1997-10-22 トムソン コンシューマー エレクトロニクス セイルズ ゲゼルシャフト ミット ベシュレンクテル ハフツング Method of transmitting and / or receiving side additional information in radio broadcast signal
JP2541233B2 (en) * 1987-08-26 1996-10-09 ソニー株式会社 Received electric field discrimination device

Also Published As

Publication number Publication date
KR0133060B1 (en) 1998-04-21
DE59006402D1 (en) 1994-08-18
DE3917236C1 (en) 1990-08-02
JP2968313B2 (en) 1999-10-25
KR900019403A (en) 1990-12-24
JPH0319528A (en) 1991-01-28
EP0399355A3 (en) 1991-10-16
ATE108590T1 (en) 1994-07-15
EP0399355A2 (en) 1990-11-28

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